Revolving turret for slide lathes and the like machines



March 3, 1970 JQL. JEANNERET I 3,498,163

REVOLVING TURRET FOR SLIDE LATHES AND THE LIKE MACHINES Filed April 10. 1 z Sheets-Sheet 1 I All- I y l I Ir- LIP-1 2 3 5 14 A M0455 A 00/: JEA/VA/E'EET YUJAM H rrys.

M h 1970 J. 1.. JEANNERET 3,498,163

REVOLVING TURRET FOR SLIDE LATHES AND THE LIKE MACHINES Filed April 1967 2 Sheets-Sheet z /m /vmes do; s: 100/: JEAN/V5195? 'dvwfJw United States Patent 3,498,163 REVOLVING TURRET FOR SLIDE LATHES AND THE LIKE MACHINES Jules Louis Jeanneret, 21 bis Boulevard Victor Hugo, Neuilly-sur-Seine, France Filed Apr. 10, 1967, Ser. No. 629,705 Claims priority, applicatiou7France, Apr. 28, 1966,

Int. Cl. B 23b 29/00 U.S. Cl. 8236 4 Claims ABSTRACT OF THE DISCLOSURE My invention has for its object a turret for slide lathes and the like machines of the type operating with a series of tools fitted at different points on a barrel revolving around its axis, said tools being located at all the same distance from the barrel axis.

The carrier of the barrel forming part of the turret according to my invention is fitted removably on a front t00l holder of any type whatever carrying a front tool so as to allow using the rear tool holder without restricting by any means its transverse travel. Any means for securing said turret on the tool holder carriage may be used.

According to an advantageous feature of my invention, the operator can control the tool-carrier barrel with a single hand in order to produce simultaneously the release of the tool engaging the work and a pivotal movement of the barrel with a view to bringing a further tool into an operative position. Said result is achieved in accordance with my invention through the fact that the lever locking the tool which is being used extends rearwardly of the turret carrier at a short distance above the handle fittedcoaxially to the rear of the barrel. Thus, the operators hand grasping the handle so as to make it rotate can depress with one finger the rear end of the locking lever whereby the tool held by the latter is released and the barrel is allowed to revolve and to locate a further tool in an operative position, the barrel being locked again as soon as the operator no longer depresses said lever. I have illustrated in the accompanying drawings a preferred embodiment of my invention. In said drawings:

FIG. 1 is an elevational view of the turret part of which is shown in longitudinal sectional view.

FIG. 2 is an end view of the turret as seen from the right-hand side of FIG. 1.

FIG. 3 is a view thereof from above.

FIG. 4 is a cross-section through line IV--IV of FIG. 1.

FIG. 5 is a cross-section through line V-V of FIG. 1.

FIG. 6 illustrates a modification.

As is apparent from inspection of the drawings, the body 1 forming a carrier for the turret is secured to the conventional tool holding block A of a lathe. A bore 2 provided in the body 1 carries a spindle 3 accurately carried in the bearings 4 and 5 in which it revolves. Radial bores 6, 7, 8, 9 (FIG. 5) are formed in the barrel 3' rigid with the spindle 2 and are located along radii lying at 90 with reference to each other. Each bore carries a suitable tool which is held fast by clamping means such as that illustrated in FIG. 1 for the tool housed in the bore 7 and lying thus in a horizontal plane, ready for operation. The clamping means provided for each of the four tools include a screw 10 the axis of which is parallel with the axis of the spindle 3, said screw being provided with threads of opposite pitches engaging the corresponding threaded nuts or tapped cores 12 so that the rotation of said screw brings the cores 11 and 12 simultaneously into contact with the tool housed in the bore and ensures its eflicient clamping. On the other hand, the axial clearance of the spindle 3 inside the body or support 1 is adjusted by a nut 14 engaging a micrometric thread formed on said spindle 3, said nut engaging the rear surface of the body 1. The handle 15 fitted on the rear end of the spindle 3 provides for actuation of the barrel with its tools.

The locking of the barrel in one of the four positions for which one of the tools is brought into its operative position in a horizontal plane is ensured by a lever or bolt 21 adapted to rock round a horizontal pivot 22 rigid with the body 1 and orthogonal with reference to the axis of the spindle 3; said bolt moves thus inside a radial notch 20 formed in a longitudinal vertical plane of the body 1. The front end of said bolt 21 is adapted to selectively engage any of the four notches 16, 17, 18 or 19 (FIG. 4) formed in the barrel and the planes of symmetry of which extend through the axes of the corresponding bores 6, 7, 8, 9 and are consequently distributed also at with reference to each other. The front section 23 of the bolt 21 is shaped so as to match the shape of the notches and it may be brought into engagement with that notch which is in a vertical position at a given moment by elastic means such as that illustrated which includes a ball 24 subjected to the action of a spring 25 and urging the rear end of the lever or bolt 21 upwardly in the direction of the arrow 26 (FIG. 1). The rear end of said lever 21 extends above the front section of the handle .15, which allows the thumb or forefinger of the operators hand grasping said handle to depress said triggershaped end of the lever 21. Thus, the operators hand is capable of making the barrel rock as soon as his finger has released the lever with reference to the notch engaged by the latter.

In the case of a machining work requiring a stress leading to a large reaction on the tool, it is possible to hold with still further rigidity the spindle 3 of the barrel fast within the body 1 by additional locking means. As illustrated in FIG. 2, one embodiment of said locking means is constituted by a lever 28 which may be depressed through a pivotal movement so as to ensure a movement towards each other of the nuts or cores 29 and 30 threadedly engaging the corresponding threads of opposite pitches on the lever pivot. Thus, said nuts clamp between them the spindle 3 over a fraction of its outer surface 31. The other embodiment of the locking means illustrated in FIG. 3 operates in a similar manner and is provided with the screw 28' engaging the tapped cores 29' and 30' acting in opposite directions on the bearing 5 carrying the spindle 3. As already mentioned, the body 1 of the turret may be secured in any suitable manner on any tool holder carriage. In the case illustrated, I make use of a wedge 32 (FIG. 2) which allows positioning at the desired level the cutting edge of the tool before the clamping thereof by the screw 33. Said securing means is only one of those that may be chosen out of the numerous securing means which may be designed to suit the shape of the carriage and the particular conditions of application. In all cases, the mounting of the turret on the tool holder carriage allows using freely the rear tool at any moment during the machining operation.

Of course the number of tools carried by the turret is irrelevant and depends on the requirements of the work to be undertaken. It may range between 2 and 6 or more. Thus, FIG. 5 shows a turret according to my invention carrying five tools 34, 35, 36, 37, 38 adapted to be brought selectively into operation.

What I claim is:

1. In combination with the carriage of a machine tool, a turret comprising a body fitted on the carriage, a spindle carried revolvably by the body, a barrel rigid with the end of the spindle projecting beyond the body and provided with a plurality of radial tool-holding bores distributed at uniform spacings in a cross-sectional plane of the barrel and a handle coaxial with the other end of the spindle and projecting clearly beyond the body, the improvement consisting in a barrel-locking lever pivotally carried by the body in a plane radial with reference to the spindle and the front end of which is adapted to engage selectively notches formed in the spindle in radial planes registering with the different bores, the outer end of the lever lying to the front of the handle so that the hand rotating the handle can simultaneously depress with a finger the rear end of the lever to raise its front end out of the notch engaged by it, and a spring urging the lever into its notch engaging position.

2. Apparatus as claimed in claim 1, said lever extending lengthwise in the direction of the axis of said spindle, the axis of pivotal movement of said lever being orthogonal with respect to the axis of rotation of the spindle.

3. Apparatus as claimed in claim 2, said handle being elongated in the direction of and coaxial with said spindle.

4. Apparatus as claimed in claim 1, said handle being elongated in the direction of and coaxial with said spindle.

References Cited UNITED STATES PATENTS 452,496 5/1891 Lindner 29-355 887,985 5/1908 Vold et al. 29-355 1,342,746 6/1920 Halstead. 3,288,005 11/1966 Tringale et al.

FOREIGN PATENTS 1,355,767 2/1964 France.

LEONIDAS VLACHOS, Primary Examiner 

